OHDEB I. RHOMBOHEDRAL LIME-HALOIDE. 83 



3. Imbedded crystals, generally twins, or consisting of 

 a greater number of individuals, are found in compound 

 varieties of prismatoidal Gypsum-haloide, mixed and co- 

 loured with oxide of iron, accompanied with crystals 

 of rhombohedral Quartz, which have likewise suffered a 

 similar admixture. Other varieties occur in the cavities 

 of basalt and other trap rocks, also in irregular beds and 

 veins. It is found in beds of iron-ores, in those coral- 

 loidal varieties, which have been called Flosferri ; also mas- 

 sive and crystallised. The first, though they occur in cavi- 

 ties or open fissures, are not products of a stalactitic forma- 

 tion. The most beautiful crystals, well defined and trans- 

 parent, occur near Bilin in Bohemia, in a vein traversing 

 basalt, and filled with a massive variety of the same spe- 

 cies, consisting of large columnar particles of composition. 

 It is often found in various repositories, along with several 

 species of the orders Glance, Pyrites, Malachite, &c. to the 

 latter of which it sometimes owes its blueish or greenish 

 colour. It likewise occurs in several kinds of lavas. 



4. The varieties imbedded in prismatoidal Gypsum- 

 haloide, have been found in the kingdom of Arragon in 

 Spain, from which the names of Arragone, Arragonite, have 

 been derived. It occurs with ores of iron in Stiria, Ca- 

 rinthia, Hungary, Transylvania, and other countries, in 

 cavities of traprocks in Bohemia, Thuringia, Hessia, on 

 the Rhine, in Baaden, France, Scotland, Iceland, &c. In 

 metallic veins or beds it is met with at Schwatz in the 

 Tyrol, Iglo in Hungary, Leadhills in Scotland, in Siberia, 

 and other places. 



2. RHOMBOHEDRAL LIME-HALOIDE. 



Limestone (with the exception of Aphrite). JAM. Syst. 

 VoL II. p. 481. Rhomboidal Limestone. Man. p. 36. 

 Carbonate of Lime. PHILL. p. 147. Bergmilch. 

 Kreide. Kalkstein. Kalktuff. Schieferspath. Stinkstein. 

 Mergel. Anthrakolith. Bituminb'ser Mergelschiefer. 

 WERN. Hoffm. H. B. III. 1. S. 2. 4. 7- 40. 46. 63. 67. 

 72. Duttenstein. Letztes Mineral-System, S. 11. 44. 



